Title page for ETD etd-12172002-141720

Type of Document Master's Thesis
Author Shepley, Brian Patrick
URN etd-12172002-141720
Title Simulating Optimal Part Yield from No. 3A Common Lumber
Degree Master of Science
Department Wood Science and Forest Products
Advisory Committee
Advisor Name Title
Smith, Robert L. Committee Chair
Kline, D. Earl Committee Member
Wiedenbeck, Janice K. Committee Member
  • rough mill
  • low-grade lumber
  • red oak
  • simulation
  • ripsaw
  • grade mix
  • cutting bill
  • arbor
  • part grade
  • small diameter timber
  • digitized
  • sawing efficiency
  • board maps
  • chopsaw
  • part yield
Date of Defense 2002-12-10
Availability unrestricted
The percentage of low-grade material composing the annual hardwood lumber production in the U.S. is on the rise. As a result, finding markets for low-grade and low-value lumber has been identified as a top priority by researchers and industry associations. Computer simulation has been used by the manufacturing industry for several decades as a decision support tool. Simulation programs are commonly used and relied on by researchers and the industry alike to conduct research on various aspects of the rough mill from processing to recovery efficiency. This research used the ROMI-RIP and ROMI-CROSS simulation programs to determine specific conditions that led to optimal part yield when processing No. 3A Common, 4/4-thickness, kiln-dried, red oak lumber in rip-first and crosscut-first operations. Results of the simulations indicated that cutting bills with narrow part widths and short part lengths are conducive to obtaining optimal part yield while processing No. 3A Common lumber. Furthermore, it was found that as the percent of No. 3A Common lumber in a grade mix increases, part yields and sawing efficiencies decrease. The results also indicated that higher part yields will be obtained when processing short-length No. 3A Common lumber between 6 and 8 feet in length.
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